Radiator for hot-air furnaces.



No. 892,737. PATENTED JULY 7, 1908.

' F. KERNAN.

RADIATOR FOR HOT AIR FURNACES.

APPLICATION FILED APR. 4.190s.

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{(35% (356 65 r; ,fnz/era Y W aw 4 PATENTED JULY 7, 1908.

F. KBRNAN. RADIATOR FOR HOT AIR FURNACES.

APPLICATION TILED APR.4,1906.

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WIT NES HSE 8 @kW FRANCIS KERNAN, OF SYRACUSE, NEW YORK.

RADIATOR FOR HOT-AIR FURNACES.

Specification of Letters Patent.

Patented July 7, 1908.

Application filed April 4, 1906. Serial No. 309,815.

To all whom it may concern:

Be it known that I, FRANCIS KERNAN, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented new and useful Improvements in Radiators for Hot-Air Furnaces, of which the following is a specification.

My invention relates to a hot air furnace and consists in a new construction and new arrangement of parts, whereby the air, flowing into and through the air tubes for the various registers, is better and more uniformly heated, and higher efficiency of the fuel is obtained.

The essential feature of my invention is means whereby the heated products of combustion are forced to the front in the radiator, so that they circulate around all the hot-air tubes, instead of flowing toward the rear directly to the diving flue and the smoke exit. I prefer to accomplish this result by closing the rear and side spaces between the tubes by baffle-plates, whereby the heated. products are forced through the spaces on each side of the front tube, to circulate around the other tubes, adjacent to the wall of the radiator, and indirectly to the diving flue, whereby the products surround the passage within the tubes, give up the greater portion of their heat, and uniformly heat the air flowing through the tubes to the hot-air chamber and to the various warm air pipes.

My invention is shown in the drawing herewith, in which the reference numerals of the description indicate the same parts in all the figures.

Figure 1 is a partial perspective view of the upper portion of a furnace, with portions broken away. Fig. 2 is a perspective view of the bottom plate of the radiator with the hot air tubes and the baffle-plates in position. Fig. 3 is a top plan of the subject matter of Fig. 2. Fig. 4 is a vertical cross section taken substantially through the center of the diving flue and of the front tube. 1

In the figures, 1 indicates the fire-pot provided with integral, extended wings 2 2, and 3 the corrugated dome of the combustion chamber having ribs 4 4, whereby large radiating surfaces are provided at the hottest point of the furnace.

6 is the casing commonly of galvanized iron, broken away to show the fire-pot and the radiator 7 having a bottom 8, which may be provided with cup joints 9 9 to receive the hot air tubes 10 10, which are connected to the warm air pipes 11 11 through the radiator top 12. Tie radiator may made of cast iron and the tubes of steel plate. There are as many of these tubes and corresponding warm air pipes as desirable and the spaces 13 13 between the tubes toward the rear may be closed by any desirable means, leaving open the preferably larger spaces 14 14 on each side of the front tube. These rearward spaces may be closed by making the tubes in one piece or arranging them in contact or otherwise, but as this might be inconvenient, I prefer to close these spaces by the simple expedient of arranging baffielates 15 15 between the tubes and extending from the bottom to the top of the radiator. These baffle-plates are preferably ar ranged within the circle of the tubes rather than without the circle. The other parts are of usual construction.

17 is the diving flue, preferably of solid cast iron, and connected at its upper end to direct draft flue 18, having damper 19, to smoke stack 20, and at its lower end to revertible draft flue 21, also communicating with smoke stack, and having check damper 22. The diving flue is provided, outside of the circle of the tubes, with the inlet open ings 23 and 24, which may be formed on each side. The upper opening 23 is adapted for the direct draft when the damper 19 is open, and the lower opening 24, for the revertible draft through the flue 21 when said damper- 19 is closed. The arrows in Fig. 3 show the course of the products which enter the radiator through the o ening 25 from the combustion chamber belbw, and then pass around the tubes to the rear.

Heretofore the roducts entering the radiator within thecircle of the tubes, took the easiest path to the stack, that is, as the openings between the connections were all open, the products took the shortest path through the rearward spaces, on the sides of the diving flue or between the rear tubes, forming a direct draft and a waste of fuel; most of the heat was communicated to the rear tubes, and little hot air was delivered through the front tubes and the pipes therefrom, with the final result that some parts of the building were overheated, and some received little or no heat.

By my construction, the heated products entering the radiator cannot ass through the rearward spaces which are c osed, but are desirably be forced initially toward the front on both sides of the front tube, and then around the outside of all the tubes, whereby they surren der and radiate a greater portion of their heat to said tubes and through the outer wall of the radiator, and all the tubes are heated uniformly. "The air discharged from the front tubes is thus substantially equal in heating capacity to the air discharged from the rear tubes.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a radiator for hot-air furnaces, the combination with a suitable shell and a suitable bottom-plate rovided with a central, lower opening to ac mit the products of com bustion to the shell and with hot air openings around said central opening, of a vertical diving-flue arranged on the plate in the rear of the shell, a plurality of vertical air-tubes arranged in the shell around the central opening, substantially in a circle, and being suitably spaced each from the adjacent tubes and the rear tubes from the diving-flue, and said tubes being fitted respectively to register with said hot air openings through the bottom-plate and to extend upwardly through the top wall of the shell, and baflie-plates arranged to extend from the diving-flue to the adjacent tubes and from tube to tube to close all the spaces except the front spaces,

said diving-flue being rovided with side openings outside the ciro e of the tubes.

2. In a hot-air furnace having a radiator, a cast metal combustion chamber having an upper central opening to the radiator, a sheet metal casing around the combustion chamber, a radiator composed of a sheet metal shell arranged above said combustion cham ber and of a bottom plate to the shell, a substantially vertical, diving-flue in said shell having lower and upper openings, two opposite side series of large hot-air tubes arranged correspondingly to extend forwardly in the radiator from the diving flue, a front air tube arranged between the two front tubes of the side series, all of said tubes being substantially vertical and spaced to leave side openings between them, and baffle-plates extending from the diving-flue to the two adjacent tubes respectively and from tube to tube, to close all the side openings except on each side of the front tube, said baffle-plates being arranged to engage with the inner portions of the tubes and of the diving-flue.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANCIS KERNAN.

Witnesses:

WAYNE N. COLE, FRANCIS I. WALTER. 

